| Title:
             | 
On continuous self-maps  and homeomorphisms of the Golomb space (English) | 
| Author:
             | 
Banakh, Taras | 
| Author:
             | 
Mioduszewski, Jerzy | 
| Author:
             | 
Turek, Sławomir | 
| Language:
             | 
English | 
| Journal:
             | 
Commentationes Mathematicae Universitatis Carolinae | 
| ISSN:
             | 
0010-2628 (print) | 
| ISSN:
             | 
1213-7243 (online) | 
| Volume:
             | 
59 | 
| Issue:
             | 
4 | 
| Year:
             | 
2018 | 
| Pages:
             | 
423-442 | 
| Summary lang:
             | 
English | 
| . | 
| Category:
             | 
math | 
| . | 
| Summary:
             | 
The Golomb space ${\mathbb N}_\tau$ is the set ${\mathbb N}$ of positive integers endowed with the topology $\tau$ generated by the base consisting of arithmetic progressions $\{a+ bn: n\ge 0\}$ with coprime $a,b$. We prove that the Golomb space ${\mathbb N}_\tau$ has continuum many continuous self-maps, contains a countable disjoint family of infinite closed connected subsets, the set $\Pi$ of prime numbers is a dense metrizable subspace of ${\mathbb N}_\tau$, and each homeomorphism $h$ of ${\mathbb N}_\tau$ has the following properties: $h(1)=1$, $h(\Pi)=\Pi$, $\Pi_{h(x)}=h(\Pi_x)$, and $h(x^{{\mathbb N}})=h(x)^{\,\mathbb N}$ for all $x\in{\mathbb N}$. Here $x^{\mathbb N}:=\{x^n\colon n\in{\mathbb N}\}$ and $\Pi_x$ denotes the set of prime divisors of $x$. (English) | 
| Keyword:
             | 
Golomb space | 
| Keyword:
             | 
arithmetic progression | 
| Keyword:
             | 
superconnected space | 
| Keyword:
             | 
homeomorphism | 
| MSC:
             | 
11A41 | 
| MSC:
             | 
54D05 | 
| idZBL:
             | 
Zbl 06997360 | 
| idMR:
             | 
MR3914710 | 
| DOI:
             | 
10.14712/1213-7243.2015.269 | 
| . | 
| Date available:
             | 
2018-12-28T15:06:27Z | 
| Last updated:
             | 
2021-01-04 | 
| Stable URL:
             | 
http://hdl.handle.net/10338.dmlcz/147548 | 
| . | 
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